[nginx] Upstream: fixed logging of required buffer size (ticket #1722).

[Maxim Dounin]

details:   https://hg.nginx.org/nginx/rev/608810849b6d
branches:  
changeset: 7456:608810849b6d
user:      Chanhun Jeong <chanhun.jeong at navercorp.com>
date:      Mon Feb 11 13:36:53 2019 +0900
description:
Upstream: fixed logging of required buffer size (ticket #1722).

diffstat:

 src/http/ngx_http_upstream.c |  2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diffs (12 lines):

diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -850,7 +850,7 @@ ngx_http_upstream_cache(ngx_http_request
 
         ngx_http_file_cache_create_key(r);
 
-        if (r->cache->header_start + 256 >= u->conf->buffer_size) {
+        if (r->cache->header_start + 256 > u->conf->buffer_size) {
             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                           "%V_buffer_size %uz is not enough for cache key, "
                           "it should be increased to at least %uz",